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Finding the Fourth Proportional to 72,761.87, 109,156.03 and 30,067.41

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Solution

The fourth proportional to 72,761.87, 109,156.03 and 30,067.41 is: 45,106.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,761.87 : 109,156.03 = 30,067.41 : x
  2. Step 2: Convert to fraction form
    72,761.87/109,156.03 = 30,067.41/x
  3. Step 3: Cross multiply
    72,761.87x = 109,156.03 × 30,067.41
  4. Step 4: Simplify right side
    72,761.87x = 3,282,038,691.65
  5. Step 5: Solve for x
    x = 3,282,038,691.65/72,761.87
  6. Step 6: Final answer
    x = 45,106.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.